Update 'Enum Type Definitions'

Enum-Type-Definitions.md

@@ -1,4 +1,6 @@
-Enums "enumerate" a pre-existing type, most likely an Int.
+
+# Syntax
+
 
 ```
 enum ro Weekday:Int
@@ -8,13 +10,23 @@ enum ro Weekday:Int
 	wednesday
 	thursday
 	friday
+
+enum ro NamedColor:U32
+	red   0xFF0000
+	green 0x00FF00
+	blue  0x0000FF
 ```
 
-Enum members can have explicitly defined values, but if they don't, their value
-is just incremented up from zero. The order in which members are listed in matters.
+Each line under an enum represents a member and is composed of a name, and an optional initialization value.
 
-Enum members are accessed similar to object members:
+Enum members are accessed similarly to object members:
 
 ```
 set day:Weekday Weekday.thursday
-```
+```
+
+# Semantics
+Enums "enumerate" a pre-existing type, most likely an Int.
+
+Enum members can have explicitly defined values, but if they don't, their value
+is just incremented up from zero. The order in which members are listed in matters.